Numerical simulation of tensile mechanical behavior of LNG cryogenic helical corrugated tube
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(1.CNOOC Gas & Power Group, Research & Development Center, Beijing 100028, China;2.CNOOC Key Laboratory of Liquefied Natural Gas and Low-Carbon Technology, Beijing 100028, China;3.School of Mechanics and Aerospace Engineering, Dalian University of Technology, Dalian 116024, China )

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TU311;TE832

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    Abstract:

    By taking into account the nonlinear factors of the cryogenic material and the structural geometric nonlinearities, a three-dimensional shell finite element model of the liquefied natural gas (LNG)cryogenic helical corrugated tube was constructed based on the parametric model. The influence of three axial cross-sectional parameters, namely wave height, wavelength, and thickness, on the tensile properties of the cryogenic helical corrugated tube was simulated and analyzed.The variation laws of stress distribution, strain characteristics, and tensile stiffness of the cryogenic helical corrugated tube under different parameters were discussed. The simulation results show that the axial cross-sectional parameters significantly affect the tensile properties of the cryogenic helical corrugated tube. As the wave height increases, both the axial stress and strain values increase, while the tensile stiffness decreases; as the wavelength increases, both the tensile stiffness and stress increase; as the thickness increases, the tensile load and tensile stiffness that the cryogenic helical corrugated tube can withstand both increase.

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程昊,李方遒,李欣欣,等.液化天然气低温螺旋波纹管拉伸力学行为数值模拟[J].河海大学学报(自然科学版),2025,53(5):170-176.(CHENG Hao, LI Fangqiu, LI Xinxin, et al. Numerical simulation of tensile mechanical behavior of LNG cryogenic helical corrugated tube[J]. Journal of Hohai University (Natural Sciences),2025,53(5):170-176.(in Chinese))

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History
  • Received:March 20,2025
  • Revised:
  • Adopted:
  • Online: September 24,2025
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